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                        HTML
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                            <b>2.</b>
                        
                        CSS
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                        字体属性
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                        文本属性
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                        背景属性
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                            <b>2.4.</b>
                        
                        盒子box
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                            <b>2.5.</b>
                        
                        浮动float
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                            <b>2.6.</b>
                        
                        定位position
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                            <b>2.7.</b>
                        
                        变形transform
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                            <b>2.8.</b>
                        
                        过渡transition
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                            <b>2.9.</b>
                        
                        阴影shadow
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                            <b>2.10.</b>
                        
                        选择器
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                            <b>2.11.</b>
                        
                        弹性盒子flex
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                            <b>2.12.</b>
                        
                        动画
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                            <b>2.13.</b>
                        
                        拓展内容
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                            <b>3.</b>
                        
                        JS
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                            <b>3.1.</b>
                        
                        if语句
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                            <b>3.2.</b>
                        
                        数据类型的转换
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                            <b>3.3.</b>
                        
                        数值类型Number
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                        字符串String
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                            <b>3.5.</b>
                        
                        数组Array
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                            <b>3.6.</b>
                        
                        数组的遍历
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                            <b>3.7.</b>
                        
                        filter过滤
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                            <b>3.8.</b>
                        
                        function函数
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                            <b>3.9.</b>
                        
                        定时器
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                            <b>3.10.</b>
                        
                        JS常用事件
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                            <b>3.11.</b>
                        
                        作用域-作用域链
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                            <b>4.</b>
                        
                        响应式Bootstrap
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                            <b>5.</b>
                        
                        ajax
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                            <b>6.</b>
                        
                        swiper
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                            <b>7.</b>
                        
                        变量提升和函数提升
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                            <b>8.</b>
                        
                        浏览器的渲染问题
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                            <b>8.1.</b>
                        
                        回流和重绘
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                            <b>9.</b>
                        
                        小事件
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                            <b>10.</b>
                        
                        创建对象的模式
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                            <b>10.1.</b>
                        
                        工厂模式
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                            <b>10.2.</b>
                        
                        构造函数
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                            <b>10.3.</b>
                        
                        原型模式和混合模式
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                            <b>11.</b>
                        
                        原型链
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                            <b>12.</b>
                        
                        this
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                            <b>13.</b>
                        
                        事件代理/事件委托
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                            <b>14.</b>
                        
                        同步&amp;异步任务
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                            <b>15.</b>
                        
                        防抖&amp;节流
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                            <b>16.</b>
                        
                        ES6
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                            <b>16.1.</b>
                        
                        let/const
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                            <b>16.2.</b>
                        
                        解构赋值
                    </a>
            
            
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                            <b>16.3.</b>
                        
                        Promise
                    </a>
            
            
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                            <b>16.4.</b>
                        
                        async&amp;await
                    </a>
            
            
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                            <b>16.5.</b>
                        
                        class
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                            <b>16.6.</b>
                        
                        module
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        <li class="chapter " data-level="16.7" data-path="md/16ES6/Set.html">
            
                
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                            <b>16.7.</b>
                        
                        Set
                    </a>
            
            
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        <li class="chapter " data-level="16.8" data-path="md/16ES6/Map.html">
            
                
                    <a href="../../md/16ES6/Map.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>16.8.</b>
                        
                        Map
                    </a>
            
            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="17" data-path="md/17garbageCollection/garbageCollection.html">
            
                
                    <a href="../../md/17garbageCollection/garbageCollection.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>17.</b>
                        
                        垃圾回收机制
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="18" data-path="md/18closure/closure.html">
            
                
                    <a href="../../md/18closure/closure.html">
                
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                            <b>18.</b>
                        
                        闭包
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19" data-path="md/19Vue/vue.html">
            
                
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                        <i class="fa fa-check"></i>
                        
                            <b>19.</b>
                        
                        Vue
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="19.1" data-path="md/19Vue/模板语法.html">
            
                
                    <a href="../../md/19Vue/模板语法.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.1.</b>
                        
                        模板语法
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.2" data-path="md/19Vue/条件渲染.html">
            
                
                    <a href="../../md/19Vue/条件渲染.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.2.</b>
                        
                        条件渲染
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.3" data-path="md/19Vue/列表渲染.html">
            
                
                    <a href="../../md/19Vue/列表渲染.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.3.</b>
                        
                        列表渲染
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.4" data-path="md/19Vue/class&amp;style.html">
            
                
                    <a href="../../md/19Vue/class&amp;style.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.4.</b>
                        
                        class&amp;style
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.5" data-path="md/19Vue/v-model.html">
            
                
                    <a href="../../md/19Vue/v-model.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.5.</b>
                        
                        v-model
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.6" data-path="md/19Vue/computed.html">
            
                
                    <a href="../../md/19Vue/computed.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.6.</b>
                        
                        计算属性
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.7" data-path="md/19Vue/watch侦听.html">
            
                
                    <a href="../../md/19Vue/watch侦听.html">
                
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                            <b>19.7.</b>
                        
                        watch侦听
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.8" data-path="md/19Vue/filter.html">
            
                
                    <a href="../../md/19Vue/filter.html">
                
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                            <b>19.8.</b>
                        
                        过滤器
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.9" data-path="md/19Vue/组件.html">
            
                
                    <a href="../../md/19Vue/组件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.9.</b>
                        
                        局部&amp;全局组件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.10" data-path="md/19Vue/通讯&amp;传递信息.html">
            
                
                    <a href="../../md/19Vue/通讯&amp;传递信息.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.10.</b>
                        
                        通讯&amp;传递信息
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.11" data-path="md/19Vue/动态组件&amp;keepAlive.html">
            
                
                    <a href="../../md/19Vue/动态组件&amp;keepAlive.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.11.</b>
                        
                        动态组件&amp;keepAlive
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.12" data-path="md/19Vue/插槽slot.html">
            
                
                    <a href="../../md/19Vue/插槽slot.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.12.</b>
                        
                        插槽slot
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.13" data-path="md/19Vue/过渡和动画.html">
            
                
                    <a href="../../md/19Vue/过渡和动画.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.13.</b>
                        
                        过渡和动画
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="19.14" data-path="md/19Vue/生命周期.html">
            
                
                    <a href="../../md/19Vue/生命周期.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>19.14.</b>
                        
                        生命周期
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="20" data-path="md/20vue-route/vue路由.html">
            
                
                    <a href="../../md/20vue-route/vue路由.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>20.</b>
                        
                        Vue路由router
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="21" data-path="md/Interview/Interview.html">
            
                
                    <a href="../../md/Interview/Interview.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>21.</b>
                        
                        JS面试题
                    </a>
            
            
        </li>
    


            
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                <a href="https://www.gitbook.com" target="blank" class="gitbook-link">
                    Published with GitBook
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    <!-- Title -->
    <h1>
        <i class="fa fa-circle-o-notch fa-spin"></i>
        <a href="../../" >小熊的电子书</a>
    </h1>
</div>

            <div class="page-wrapper" tabindex="-1" role="main">
                <div class="page-inner">
                
                
                    <section class="normal" id="section-">
                    
                        <h2 id="&#x8FDB;&#x5EA6;&#x6761;">&#x8FDB;&#x5EA6;&#x6761;</h2>
<h5 id="&#x9759;&#x6001;&#x4EE3;&#x7801;&#xFF0C;&#x4FE9;&#x4E2A;div&#xFF0C;&#x4E00;&#x4E2A;&#x5916;&#x9762;&#xFF0C;&#x4E00;&#x4E2A;&#x91CC;&#x9762;&#x7684;&#x586B;&#x5145;&#x5185;&#x5BB9;">&#x9759;&#x6001;&#x4EE3;&#x7801;&#xFF0C;&#x4FE9;&#x4E2A;div&#xFF0C;&#x4E00;&#x4E2A;&#x5916;&#x9762;&#xFF0C;&#x4E00;&#x4E2A;&#x91CC;&#x9762;&#x7684;&#x586B;&#x5145;&#x5185;&#x5BB9;</h5>
<pre><code>&lt;style&gt;
      * {
        box-sizing: border-box;
      }
      .progressBox {
        width: 500px;
        height: 50px;
        border: 5px solid steelblue;
        border-radius: 25px;
      }
      .progress {
        height: 100%;
        width: 0%;
        background-color: red;
        border-radius: 25px;
        /* transition: all 0.1s; */
      }
&lt;/style&gt;

&lt;body&gt;
&lt;button id=&quot;btn1&quot; style=&quot;margin: 20px;&quot;&gt;&#x7B2C;&#x4E00;&#x79CD;&#x65B9;&#x6CD5;&lt;/button&gt;
    &lt;div class=&quot;progressBox&quot;&gt;
      &lt;div class=&quot;progress&quot;&gt;&lt;/div&gt;
    &lt;/div&gt;
  &lt;button id=&quot;btn2&quot; style=&quot;margin: 20px;&quot;&gt;&#x7B2C;&#x4E8C;&#x79CD;&#x65B9;&#x6CD5;&lt;/button&gt;
&lt;/body&gt;
</code></pre><h5 id="script&#x5185;&#x5BB9;">script&#x5185;&#x5BB9;</h5>
<pre><code>    let btn1 = document.querySelector(&quot;#btn1&quot;),
        progress = document.querySelector(&quot;.progress&quot;);

    // &#x7B2C;&#x4E00;&#x79CD;&#x65B9;&#x6CD5;
    function animate1(){
        let num = 0,
            speed = 100/60;
        let timer = setInterval(function(){
            progress.style.width = `${num+=speed}%`;
            if(num&gt;=100){
                clearInterval(timer);
            }

        },16.7)
    }
    annimate1();

    //&#x7B2C;&#x4E8C;&#x79CD;&#x65B9;&#x6CD5;
    //requestAnimationFrame(evenHandler):&#x63A5;&#x53D7;&#x4E00;&#x4E2A;&#x4E8B;&#x4EF6;&#x5904;&#x7406;&#x7A0B;&#x5E8F;&#x3002;&#x6839;&#x636E;&#x5C4F;&#x5E55;&#x91CD;&#x7ED8;&#x9891;&#x7387;&#x4F5C;&#x4E3A;&#x6267;&#x884C;&#x95F4;&#x9694;&#xFF0C;&#x4E0D;&#x9700;&#x8981;&#x8BBE;&#x7F6E;&#x8C03;&#x7528;
    function animate2(){
        let prog = 0;
        speed = 100/60;
        let timer;
        function change(){
            prog+=speed;
            if(pro&gt;=100){
                // &#x5982;&#x679C;&#x5230;&#x8FBE;100% &#x5219;&#x6E05;&#x9664;&#x52A8;&#x753B;&#x5E76;&#x4ECE;&#x5185;&#x5B58;&#x4E2D;&#x79FB;&#x9664;
                  cancelAnimationFrame(timer);
            }else {
            //&#x9012;&#x5F52;&#x8C03;&#x7528;change
            timer = requestAnimationFrame(change);
          }
            progress.style.width = `${prog}%`;

        }
        //&#x542F;&#x52A8;change&#x52A8;&#x753B;
        // requestAnimationFrame(change);&#x5982;&#x4E0B;
         change();

    }
      btn1.addEventListener(&quot;click&quot;, animate1);
      btn2.addEventListener(&quot;click&quot;, animate2);
</code></pre><h2 id="&#x5C01;&#x88C5;&#x4E00;&#x4E2A;ajax&#x5E76;&#x4E14;&#x63D0;&#x4F9B;&#x53EF;&#x4EE5;&#x8BBE;&#x7F6E;&#x8BF7;&#x6C42;&#x8D85;&#x65F6;&#x7684;&#x529F;&#x80FD;">&#x5C01;&#x88C5;&#x4E00;&#x4E2A;ajax&#x5E76;&#x4E14;&#x63D0;&#x4F9B;&#x53EF;&#x4EE5;&#x8BBE;&#x7F6E;&#x8BF7;&#x6C42;&#x8D85;&#x65F6;&#x7684;&#x529F;&#x80FD;</h2>
<pre><code>function $ajax({method = &quot;GET&quot;,url,timeout = 2000}){
    function _ajax(){
        return new Promise(function(resolve,reject){
            let xhr = new XMLHttpRuquest();
            xhr.open(method,url);
            xhr.addEventListener(&quot;readystatechange&quot;,function(){
            if(xhr.readystate != 4){
                return;
            }

            if(xhr.status == 200){
                resolve(JSON.parse(xhr.response));
            }else{
                reject({
                    msg:&quot;&#x8BF7;&#x6C42;&#x63A5;&#x53E3;&#x5931;&#x8D25;&quot;,
                    url:url,
                    status:xhr.status,
                })        
            }        
            })
            xhr.send();
        })
    }

    //&#x5B9A;&#x4E49;&#x4E00;&#x4E2A;&#x7528;&#x4E8E;&#x89E6;&#x53D1;&#x8D85;&#x65F6;&#x7684;promise&#x5B9E;&#x4F8B;&#xFF1B;
    let timer = new Promise((resolve,reject)=&gt;{
        setTimeout(()=&gt;{
            reject(&quot;&#x8BF7;&#x6C42;&#x8D85;&#x65F6;&quot;)
        },timeout)
    })
    //Promise.race([p1,p2]) &#x6709;&#x4E00;&#x4E2A;&#x5148;&#x6539;&#x53D8;&#x72B6;&#x6001;&#xFF0C;&#x5219;&#x6267;&#x884C;&#x4ED6;&#x7684;&#x56DE;&#x8C03;
    return Promise.race([_ajax(),timer])
}
    $ajax({url:&quot;https://edu.couchpotato.fun/other/timeout&quot;,timer:3000}).then(res=&gt;{
        console.log(res)
    }).catch(err=&gt;{
        console.log(err);
    })
</code></pre><h2 id="&#x9009;&#x9879;&#x5361;">&#x9009;&#x9879;&#x5361;</h2>
<ul>
<li>&#x9700;&#x6C42;&#xFF1A;&#x901A;&#x8FC7; &#x9009;&#x9879; &#x548C; &#x663E;&#x793A;&#x5BF9;&#x8C61;&#x4E0B;&#x6807;&#x4E00;&#x4E00;&#x5BF9;&#x5E94;&#x7684;&#x7279;&#x70B9;&#xFF0C;&#x901A;&#x8FC7;&#x70B9;&#x51FB;&#x4E8B;&#x4EF6;&#x6765;&#x5207;&#x6362;&#x663E;&#x5F0F;&#x7684;&#x5143;&#x7D20;<h4 id="&#x9759;&#x6001;&#x4EE3;&#x7801;">&#x9759;&#x6001;&#x4EE3;&#x7801;</h4>
<pre><code>&lt;style&gt;
         * {
             box-sizing: border-box;
         }
         .box {
              width: 600px;
              height: 500px;
              margin: 0 auto;
              border: 1px solid black;
          }
          .nav {
              overflow: hidden;
          }
          .nav div {
              cursor: pointer;
              float: left;
              height: 100px;
              width: 33.3333%;
              border: 1px solid black;
          }
          .content {
              height: 398px;
              border: 1px solid black;
          }
          .content div {
              display: none;
              height: 100%;
              /* color: white; */
          }
          .content .active {
              display: block;
          }
&lt;/style&gt;
      &lt;div class=&quot;box&quot;&gt;
          &lt;div class=&quot;nav&quot;&gt;
              &lt;div&gt;&#x9009;&#x9879;1&lt;/div&gt;
              &lt;div&gt;&#x9009;&#x9879;2&lt;/div&gt;
              &lt;div&gt;&#x9009;&#x9879;3&lt;/div&gt;
          &lt;/div&gt;
          &lt;div class=&quot;content&quot;&gt;
              &lt;div class=&quot;active&quot;&gt;&#x5185;&#x5BB9;&#x4E00;&lt;/div&gt;
              &lt;div&gt;&#x5185;&#x5BB9;&#x4E8C;&lt;/div&gt;
              &lt;div&gt;&#x5185;&#x5BB9;&#x4E09;&lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
</code></pre><h4 id="js&#x4EE3;&#x7801;">JS&#x4EE3;&#x7801;</h4>
</li>
</ul>
<pre><code>//&#x7B2C;&#x4E00;&#x79CD;&#x5B9E;&#x73B0;&#x65B9;&#x6CD5;&#xFF1A;&#x901A;&#x8FC7;&#x904D;&#x5386;&#x7ED9;&#x6BCF;&#x4E00;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#x6DFB;&#x52A0;&#x70B9;&#x51FB;&#x4E8B;&#x4EF6;
let navList = document.querySelectorAll(&quot;.nav div&quot;);
let contentList = document.querySelectorAll(&quot;.content div&quot;);
navList.foreach((el,index)=&gt;{
    el.addEventListener(&quot;click&quot;,()=&gt;{
        move();
        constentList[index].classlist.add(&quot;.active&quot;);
    })
})
//&#x5C01;&#x88C5;&#x4E00;&#x4E2A;&#x6E05;&#x9664; .active &#x7684;&#x65B9;&#x6CD5;
function move(){
    contentList.foreach((el)=&gt;{
        el.classlist.remove(&quot;.active&quot;)
    })
}

//&#x7B2C;&#x4E8C;&#x79CD;&#x5B9E;&#x73B0;&#x65B9;&#x6CD5;&#xFF1A;&#x901A;&#x8FC7;&#x4E8B;&#x4EF6;&#x59D4;&#x6258;&#x4E3A;&#x7236;&#x5143;&#x7D20;&#x6DFB;&#x52A0;&#x70B9;&#x51FB;&#x4E8B;&#x4EF6;
let nav = document.querySelector(&quot;.nav&quot;);
let contentList = document.querySelectorAll(&quot;.content div&quot;);
nav.addEventListener(&quot;click&quot;,function(){
    let target = this.target;
    let tarIdx = [...nav].indexOf(target);
    move();
    constentList[tarIdx].classList.add(&quot;.active&quot;);
})
//&#x5C01;&#x88C5;&#x4E00;&#x4E2A;&#x6E05;&#x9664; .active &#x7684;&#x65B9;&#x6CD5;
function move(){
    contentList.foreach((el)=&gt;{
        el.classlist.remove(&quot;.active&quot;)
    })
}

//&#x7B2C;&#x4E09;&#x79CD;&#x5B9E;&#x73B0;&#x65B9;&#x6CD5;:class &#x9762;&#x5411;&#x5BF9;&#x8C61;
class Tab{
    constructor({navItem,contentItem}){
        this.navList = document.querySelectorAll(navItem);
        this.contentList = document.querySelectorAll(contentItem);
    }
    init(){
        this.navLiat.foreach((el,idx)=&gt;{
            //&#x5982;&#x679C;&#x4E0D;&#x9002;&#x7528;bind,&#x5219;changgeTab&#x5185;this&#x6307;&#x5411;el
            el.addEventListener(&quot;click&quot;,this.changgeTab.bind(this,idx))
        })
    }
    changgeTab(idx){
        this.move();
        this.contentList[idx].classList.add(&quot;active&quot;);
    }
    move(){
        this.contentList.foreach((el)=&gt;{
            el.classlist.remove(&quot;active&quot;);
        })
    }
}
//&#x8FD0;&#x7528;&#x7C7B;&#x6784;&#x5EFA;tab
let tab = new Tab({
    navItem:&quot;.nav div&quot;,
    contentItem:&quot;.content div&quot;
});
tab.init();
</code></pre><h2 id="&#x53CC;&#x5411;&#x7ED1;&#x5B9A;">&#x53CC;&#x5411;&#x7ED1;&#x5B9A;</h2>
<ul>
<li>&#x53CC;&#x5411;&#x7ED1;&#x5B9A;&#xFF1A;&#x9875;&#x9762;&#x6570;&#x636E;&#x7684;&#x6539;&#x53D8;&#xFF0C;&#x4F1A;&#x5F71;&#x54CD;JS&#x5185;&#x7684;&#x6570;&#x636E;&#xFF0C;JS&#x5185;&#x7684;&#x6570;&#x636E;&#x7684;&#x6539;&#x53D8;&#xFF0C;&#x540C;&#x6837;&#x4F1A;&#x5F71;&#x54CD;&#x9875;&#x9762;&#x7684;&#x6570;&#x636E;</li>
<li>Obj.defineProperty(&#x8981;&#x64CD;&#x4F5C;&#x7684;&#x5BF9;&#x8C61;&#xFF0C;&#x8981;&#x8BBE;&#x7F6E;&#x7684;&#x5C5E;&#x6027;&#xFF0C;&#x76F8;&#x5173;&#x8BBE;&#x7F6E; ) </li>
<li>&#x6CE8;&#x610F;&#xFF1A;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x9700;&#x8981;&#x4E3A;&#x5B57;&#x7B26;&#x4E32;</li>
<li>&#x7B2C;&#x4E09;&#x4E2A;&#x53C2;&#x6570;&#x4EE5;&#x5BF9;&#x8C61;&#x7684;&#x5F62;&#x5F0F;&#x4F20;&#x9012; &#x76F8;&#x5173;&#x914D;&#x7F6E;</li>
</ul>
<pre><code>    &#x9700;&#x6C42;&#xFF1A;&#x901A;&#x8FC7;&#x6587;&#x672C;&#x6846;&#x83B7;&#x53D6;&#x8F93;&#x5165;&#x4FE1;&#x606F;&#xFF0C;&#x4FDD;&#x5B58;&#x5728;&#x53D8;&#x91CF;&#x91CC;&#x9762;&#xFF0C;&#x5B9E;&#x73B0;&#x6539;&#x53D8;&#x53D8;&#x91CF;&#x4ECE;&#x800C;&#x6539;&#x53D8;&#x6587;&#x672C;&#x6846;&#x5185;&#x5BB9;

&#x9759;&#x6001;&#x5185;&#x5BB9;&#xFF1A; &#x8BF7;&#x8F93;&#x5165;&lt;input type=&quot;text&quot; class=&quot;ipt&quot;&gt;

let data = {};
//&#x7531;&#x4E8E;set get &#x64CD;&#x4F5C;&#x81EA;&#x8EAB;&#x4F1A;&#x5BFC;&#x81F4;&#x6B7B;&#x5FAA;&#x73AF;&#xFF0C;&#x6240;&#x4EE5;&#x4F7F;&#x7528;&#x7B2C;&#x4E8C;&#x4E2A;&#x53D8;&#x91CF;&#x6765;&#x5B58;&#x653E;&#x771F;&#x5B9E;&#x7684;&#x6570;&#x636E; _data
let _data = {};
let ipt = document.querySelector(&quot;input&quot;,function(){
    //&#x5C06;&#x9875;&#x9762;&#x7684;&#x8F93;&#x5165;&#x6570;&#x636E;&#x5B58;&#x653E;&#x5728; data.iptval  &#x91CC;&#x9762; (JS&#x91CC;&#x9762;)
    data.iptVal = this.value;
})

//&#x5F53;data&#x503C;&#x6539;&#x53D8;&#x65F6;&#xFF0C;&#x671F;&#x671B;&#x80FD;&#x591F;&#x540C;&#x6B65;&#x5448;&#x73B0;&#x5230;&#x9875;&#x9762;
//&#x5F53;data &#x7684; iptVal&#x5C5E;&#x6027;&#x5B9A;&#x4E49;setter&#x51FD;&#x6570;&#xFF0C;&#x7528;&#x4E8E;&#x62E6;&#x622A;&#x9ED8;&#x8BA4;&#x7684;&#x8D4B;&#x503C;&#x884C;&#x4E3A;&#xFF1B;

Object.defineProperty(data,&apos;iptVal&apos;,{
    //&#x8BBE;&#x7F6E;/&#x90E8;&#x7F72; &#x5C5E;&#x6027;&#x7684;&#x8D4B;&#x503C;&#x62E6;&#x622A;&#x5668;
    //&#x5F53;data.iptVal &#x4F7F;&#x7528; = &#x8D4B;&#x503C;&#x65F6;&#xFF0C;&#x4F1A;&#x89E6;&#x53D1;set&#x51FD;&#x6570;
    set(newValue){
        //newValue: &#x4F7F;&#x7528; = &#x8D4B;&#x503C;&#x65F6;&#xFF0C;&#x53F3;&#x4FA7;&#x7684;&#x6570;&#x636E;
        console.log(&quot;&#x8D4B;&#x503C;&#x7684;&#x6570;&#x636E;&#x662F;&quot;,newValue)
        ipt.value = newValue;
        //&#x5C06;&#x6570;&#x636E;&#x8BB0;&#x5F55;&#x5728; _data &#x5185;&#xFF0C;&#x800C;&#x4E0D;&#x662F;data&#x672C;&#x8EAB;;
        _data.iptVal = newValue;
        //&#x6CE8;&#x610F;&#xFF0C;&#x4E0D;&#x8981;&#x5728;&#x5C5E;&#x6027;&#x7684;&#x8D4B;&#x503C;&#x51FD;&#x6570;&#x5185;&#x7EE7;&#x7EED;&#x8D4B;&#x503C;&#x7ED9;&#x81EA;&#x5DF1;&#xFF0C;&#x907F;&#x514D;&#x4EA7;&#x751F;&#x6B7B;&#x5FAA;&#x73AF;
        //&#x9519;&#x8BEF;&#x4F8B;&#x5B50;  data.iptval = newValue;
    }
    //&#x5C5E;&#x6027;&#x7684; &#x53D6;&#x503C;&#x62E6;&#x622A;&#x5668;
    //&#x5F53;&#x6211;&#x4EEC; &#x8BBF;&#x95EE; data.iptVal &#x65F6;&#xFF0C;&#x89E6;&#x53D1;get &#x51FD;&#x6570;
    get(){
        return _data.iptval;
    }
})
</code></pre>
                    
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